An Arabian Sandstorm is very similar to a "Cleveland Steamer" or a "Dutch Oven With Brownies". To give someone the gift of an "Arabian Sandstorm" you wait until they fall asleep and their mouth is open. Quietly you put your ass right infront of their mouth and give them a "wet fart" in the mouth.

"AAAUGH!!" The drunken frat boy screamed as he spat the chunks of turds out of his mouth. "That was a nasty Arabian Sandstorm."

An "Arabian Sand-Storm" is basically another trick to play on your mates when they are passed out. It consists of putting a testicle in both eye sockets and flatulating in the recipiants mouth, giving them a dry mouth, bad breath and a furry pair of testes in their eyes for when they wake up.

Mitch: Holy Macrel Gav Is Passed Out From Excessive Drinking
Bundi: Why Yes He Is Mitch, Perhaps We Should Do Something Of Comedical Benefit To Further Extend The Laughs We Had Tonight!
Angus: An Arabian Sand-Storm Would Be Ever So Hilarious...

Normally performed outdoors or at the beach, the act of busting a nut on the females face then immediately taking a pile of sand or dirt and throwing it at her face. The sand sticks to her face via your load and it looks like she just walked through a sandstorm.